KR102049965B1 - Rectifying apparatus having stand-by power saving function - Google Patents

Abstract

The present invention discloses a rectifying device having a standby power saving function. According to the present invention, when the voltage of the unsmoothed direct current power output from the rectifying unit rectifying the AC power drops below the discharge reference voltage at the time of approaching the zero crossing point of the AC power supply, the capacitor charged by the unsmoothed direct current power supply is instantaneously. It is possible to supply a stable DC power supply to the load without using an electrolytic capacitor by discharging to be synthesized with the unsmoothed DC power supply. In particular, the present invention can prevent the generation of the surge voltage during charge and discharge of the capacitor by controlling the amount of current flowing through the capacitor by adjusting the resistance value of the surge protection switch connected in series with the capacitor. In addition, the present invention is capable of receiving and transmitting data at low power as well as transmitting and receiving data by using a data receiving unit and a data transmitting unit including a high frequency oscillation oscillator, a double voltage circuit composed of a capacitor and a diode. And electrical insulation can be maintained. In addition, since the data receiver and the data transmitter of the present invention are driven by the high frequency oscillator, the standby power can be reduced.

Description

Rectifying apparatus having stand-by power saving function

The present invention relates to a rectifier, and more particularly, to a rectifier for converting AC power into DC power while having a standby power saving function.

The AC power supplied from commercial power sources does not have a constant voltage value, and in the process of converting AC power to DC power, the AC power may be stably used by smoothing AC to DC using a high voltage capacitor or the like.

In addition, the high-voltage capacitor used to smooth the direct current has a shortened lifetime due to the stress caused by the AC power supply, and the smoothing method is a simple method in which the rectified voltage is charged by the capacitor after the AC voltage is rectified through the rectifier. The power factor is not good because it is smoothed by the method.

In particular, aluminum electrolytic capacitors, which are commonly used for smoothing high pressure direct current, have a large size, a large internal resistance, and an internal electrolyte, which are sensitive to temperature changes, and thus have a significantly reduced lifespan at high and low temperatures. .

In recent years, there is an increasing demand for a DC converter capable of providing a function capable of always providing a constant DC voltage to the load side, as well as reducing standby power and controlling power by direct communication. In addition, expectations for a DC converter having improved durability as well as miniaturization and high efficiency of the IoT converter are increasing.

Conventionally, SMPS (Switching Mode Power Supply) has been used to stably supply DC power required for electronic products. However, in the case of converting AC power to DC power using SMPS, in order to reduce ripple of AC 50Hz or 60Hz, aluminum electrolytic capacitors are generally smooth, and booster is used to improve power factor. Since a method such as boosting and smoothing is used, a high-voltage power stress is exerted on circuit components, which causes a problem that SMPS cannot continuously supply a stable DC power supply.

In addition, since the SMPS uses a large-capacity electrolytic capacitor in its internal circuit, the size of the DC converter increases.

As IoT products rapidly spread, in order to secure electrical safety with other electronic terminal devices, a necessity for a function of performing communication in an insulated state and turning on / off power through communication is increasing.

The problem to be solved by the present invention is to rectify the DC power rectified in the rectifier without using an electrolytic capacitor that causes frequent failure, smoothing while preventing the occurrence of surge voltage, to supply a stable DC power supply To provide.

In addition, another problem to be solved by the present invention is to provide a rectifying device having an isolated communication function and standby power control function, while buck / boost so that the required DC power is supplied to the load side.

Rectification apparatus according to a preferred embodiment of the present invention for solving the above problems, the rectifying unit for rectifying the AC power to output a non-smoothing DC power; A buck / boost circuit unit receiving DC power from the output terminal of the rectifying unit and boosting or stepping down the load according to a control signal input from the main controller; When the non-smoothing DC power is charged and the voltage of the non-smoothing DC power is less than or equal to the discharge reference voltage, the smoothed power is discharged to the output terminal of the rectifier in accordance with the discharge control signal input from the main controller. Charge and discharge unit for generating a smoothed DC power by overlapping the non-DC power supply; A data receiver configured to receive data from an external device and output the data to a shift register; The shift register outputting an operation start signal when data input from the data receiving unit matches an operation start code; An operation switching unit driving the charging and discharging unit and the main control unit when the operation start signal is input; And controlling the buck / boost circuit to boost or step down the DC power inputted to the buck / boost circuit to the load side, receive a zero crossing point of the AC power from the rectifier, and close the zero crossing point. And a main controller configured to discharge the charge / discharge unit by outputting the discharge control signal to the charge / discharge unit when the DC voltage that is not smoothed becomes equal to or less than the discharge reference voltage.

The charging and discharging unit may include: a discharge switching unit including at least one discharge switch connected to an output terminal of the rectifying unit and switched on or off according to the discharge control signal; And one or more capacitors connected in series with the discharge switch, charged by the unsmooth DC power supply and discharged when the discharge switch is turned on, and surge protection control connected in series with the capacitors, respectively, in series. It may include a charging unit including a surge protection switch whose resistance is controlled in accordance with the signal.

In addition, the main controller may turn off the surge prevention switch while the voltage applied to the capacitor is equal to or greater than the surge prevention reference voltage to prevent generation of a surge voltage.

In addition, while the voltage applied to the capacitor is greater than or equal to the surge protection reference voltage, the main controller increases the resistance value of the surge protection switch in proportion to the amount that the voltage applied to the capacitor exceeds the surge protection reference voltage to increase the surge voltage. Can be prevented.

In addition, the surge protection switch is implemented as a triac switch, and the main controller outputs a voltage to the gate of the triac switch inversely proportional to the amount of the voltage applied to the capacitor exceeds the surge protection reference voltage. It is possible to prevent the generation of surge voltage by increasing the resistance value of the switch.

The operation switching unit may drive the charging and discharging unit and the main control unit by connecting a ground ground and an analog ground when the operation start signal is input from the shift register.

In addition, a preferred embodiment of the present invention, by generating a driving voltage (VDD) using the DC power output from the rectifier, and outputs the driving voltage (VDD) to the shift register, the data receiving unit and the main control unit It may further include a power management unit for driving.

The data receiver may further include an oscillator configured to be driven according to data received from an external device to generate a signal corresponding to the received data; And a double voltage circuit for amplifying a signal output from the oscillator and outputting the amplified signal to the shift register and the main controller.

The main controller may output the discharge control signal to the charging and discharging unit to immediately discharge all of the power charged in the charging and discharging unit to the output terminal of the rectifying unit, and when the voltage at the output terminal of the rectifying unit falls below the discharge reference voltage. And resetting the average value of the discharge reference voltage value and the lowest voltage value of the output terminal below the discharge reference voltage to a discharge reference voltage value, and adjusting the discharge timing to discharge the charge / discharge unit from the reset discharge reference voltage value. have.

The main controller may detect a current flowing in the load from a voltage applied to a resistor connected in series to the load, and stop the operation of the buck / boost circuit unit when an overcurrent flows in the load.

According to the present invention, when the voltage of the unsmoothed direct current power output from the rectifying unit rectifying the AC power drops below the discharge reference voltage at the time of approaching the zero crossing point of the AC power supply, the capacitor charged by the unsmoothed direct current power supply is instantaneously. It is possible to supply a stable DC power supply to the load without using an electrolytic capacitor by discharging to be synthesized with a non-smoothing DC power supply.

In particular, the present invention can prevent the generation of a surge voltage during charge and discharge of the capacitor by controlling the amount of current flowing through the capacitor by adjusting the resistance value of the surge protection switch connected in series with the capacitor.

In addition, the present invention is capable of receiving and transmitting data at low power as well as transmitting and receiving data by using a data receiving unit and a data transmitting unit including a high frequency oscillation oscillator, a double voltage circuit composed of a capacitor and a diode. And electrical insulation can be maintained.

In addition, since the data receiver and the data transmitter of the present invention are driven by the high frequency oscillator, the standby power can be reduced.

1 is a circuit diagram showing the overall configuration of a rectifier having a standby power saving function according to a preferred embodiment of the present invention.
2 is a view for explaining a DC smoothing method according to a preferred embodiment of the present invention.
3A is a diagram showing in detail the configuration of a data receiver according to a preferred embodiment of the present invention.
3B is a diagram showing in detail the configuration of the data transmission unit according to the preferred embodiment of the present invention.
3C is a diagram illustrating an example of a double voltage circuit included in a data receiver and a data transmitter according to a preferred embodiment of the present invention.
4 is a view for explaining a concept of preventing a surge voltage according to a preferred embodiment of the present invention.
5 is a view for explaining a concept of preventing a surge voltage according to another preferred embodiment of the present invention.
6 is a view for explaining a DC smoothing method according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a circuit diagram showing the overall configuration of a rectifier having a standby power saving function according to a preferred embodiment of the present invention, Figure 2 is a diagram illustrating a DC smoothing method according to a preferred embodiment of the present invention.

1 and 2, a rectifier having a standby power saving function according to an exemplary embodiment of the present invention includes a rectifier 110, a power manager 120, a charge / discharge unit 130, The main control unit 150 includes a main control unit 150, a buck / boost circuit 140, a data receiving unit 160, a data transmitting unit 180, a shift register 170, and an operation switching unit 190. It is configured by.

The rectifier 110 receives an AC power from a commercial power supply, rectifies the DC power, and outputs an unsmoothed DC power supply (see 111 of FIG. 1 and FIG. 2A). In addition, the rectifier 110 detects a zero crossing point of the input AC power and outputs a zero crossing signal ZCD indicating a zero crossing point to the main controller 150.

The power manager 120 is connected to the output node of the rectifier 110 to generate a driving voltage VDD for driving the respective components using the unsmoothed DC power output from the rectifier 110 to generate the driving voltage VDD. To provide.

The charging and discharging unit 130 includes a discharge switching unit 131 and a charging unit 133.

As shown in FIG. 1, the charging unit 133 is formed in a structure in which one or more capacitors C1 to Cn are connected in parallel to each other, and a surge protection switch (eg, a tri Vice versa) (T5 ~ T6) are connected in series.

The charging unit 133 charges the internal capacitors C1 to Cn by using the unsmoothed DC power output from the rectifier 110 through the diodes D2 to Dn. At this time, the surge protection switch (T5 ~ T6) is normally in the on state, the resistance is kept very low, and if it is determined that there is a possibility that a surge voltage may occur, the surge protection switching signal SGV1 to SGVn) is turned off or the resistance value is changed by the flow angle adjustment to control the current flowing through the capacitor, thereby preventing surge voltage generation.

  The discharge switching unit 131 includes one or more semiconductor switches connected in series with each capacitor of the charging unit 133. Each semiconductor switch of the discharge switching unit 131 is turned on according to a control signal input from the main controller 150 to smooth the unsmoothed DC power output from the rectifier 110.

In detail, the discharge switching unit 131 maintains a turn-off state while the capacitors C1 to Cn are charged by the DC power output from the rectifying unit 110, and then the unsmoothing DC output from the rectifying unit 110. When the voltage of the power supply falls below the discharge reference voltage near the zero crossing point of the AC power input to the rectifying unit 110, the output node of the rectifying unit 110 instantaneously turns on the power charged in the capacitors C1 to Cn. To discharge.

Then, the power discharged from the capacitors C1 to Cn overlaps the DC power output from the rectifying unit 110, and the DC power input to the buck / boost circuit unit 140 is not smoothed DC output from the rectifying unit 110. The voltage below the discharge reference voltage in the voltage waveform of the power supply becomes a waveform filled by the voltage discharged from the capacitors C1 to Cn (see 113 in FIG. 1 and FIG. 2B).

Although two capacitors are shown in FIG. 1, in a preferred embodiment of the present invention, if necessary, three or more capacitors may be connected in parallel to form a charging unit 133, and these capacitors are shown in FIG. 2. As will be appreciated by those skilled in the art, one may sequentially discharge one by one.

After the discharge is performed, the semiconductor device included in the discharge switching unit 131 is turned off again under the control of the main controller 150, and the capacitors C1 to Cn of the charging unit 133 are output from the rectifying unit 110. It is charged again by the direct current power source.

In the example illustrated in FIG. 2, three capacitors are included in the charging unit 133, and a voltage waveform that appears when the capacitors are sequentially discharged is illustrated. 2, the main controller 150, which will be described later, receives a voltage applied to the resistor R7 through the Vcomp1 terminal to output an output terminal of the rectifier 110, that is, an input terminal of the buck / boost flasher 140. You can check the voltage applied to the

In the case of reference numeral 310, the voltage value corresponds to 100 V, which is the discharge reference value. However, since the voltage of the power input from the zero crossing point to the buck / boost circuit unit 140 is increasing, the discharge switching unit 131 is turned on. Do not discharge the capacitor.

However, in the case of reference numeral 320, since the voltage level of the power input to the buck / boost circuit section 140 is declining from the zero crossing point, and the voltage value also falls below 100 V, which is the discharge reference value, the main control unit ( 150 discharges the first capacitor, and when the power charged in the first capacitor is discharged to the output terminal, the waveform of the voltage input to the buck / boost circuit unit 140 rapidly rises as shown by reference numeral 201.

On the other hand, the main control unit 150 examines the output voltage of the buck / boost circuit unit 140, when the first capacitor is discharged and the input voltage of the buck / boost circuit unit 140 rapidly rises, and then falls back to the discharge reference voltage, The discharge control signal is output to the discharge switch connected to the second capacitor to switch on to discharge the charging power of the second capacitor, and when the second capacitor is discharged, the output voltage rises again (see reference numeral 202).

In the same manner, the main controller 150 discharges the charging power of the third capacitor by turning on the discharge switch connected to the third capacitor when the input voltage of the buck / boost circuit unit 140 rapidly increases and then falls back to the discharge reference voltage. When the third capacitor is discharged, the input voltage of the buck / boost circuit unit 140 rapidly rises again (see reference numeral 203).

After the third capacitor is discharged, the voltage output from the rectifying unit 110 and input to the buck / boost circuit unit 140 rises above the discharge reference voltage and the capacitors of the charging unit 133 start to be charged again. Thereafter, the above-described process is repeated, and when the voltage at the output terminal (the input terminal of the buck / boost circuit) of the rectifier 110 falls below the discharge reference voltage, the first to third capacitors are sequentially discharged, and the reference numeral 211 is used. , 212, 213 and 221, 222, and 223, a voltage equal to or greater than the discharge reference voltage is input to the buck / boost circuit unit 140.

In response to the control signal input from the main controller 150, the buck / boost circuit unit 140 receives the DC power smoothed by the discharge switching process and step-down or step-up to provide it to the load side.

The data receiver 160 starts operation of the entire electronic device including the rectifier device of the present invention or the rectifier device of the present invention from an external device (an external sensor, a remote controller, a control device, a control server, etc. interlocked with the rectifier device of the present invention). Receives data indicating a or data indicating a specific function and outputs to the shift register 170 and the main control unit 150. The data receiver 160 is designed to be insulated from an external device so as not to be electrically influenced by the external device.

The shift register 170 stores an operation start code and an operation end code therein, check whether the data input from the data receiving unit 160 matches the operation start code or the operation type code, and input the data. If the operation start code coincides with the operation start code, the entire rectifier is operated by turning on the standby power switch T4 included in the operation switch unit 190, and if the input data matches the operation end code, the operation switch unit 190 The operation of the entire rectifier device is terminated by turning off the standby power switch T4 included therein.

The data transmitter 180 transmits the data received from the main controller 150 to an external device that interworks with the rectifier of the present invention. The data transmitter 180 is also designed to be insulated from an external device like the data receiver 160 so as not to be electrically influenced by the external device.

The operation switching unit 190 connects or disconnects the ground ground (GND) and the analog ground (AGND) under the control of the shift register 170, the overall configuration of the rectifier according to a preferred embodiment of the present invention Activate or end an element.

Specifically, referring to FIG. 1, when the operation start control signal is input from the shift register 170, the standby power switch T4 is turned on and a current flowing from the VDD to the SHUT terminal of the main controller 150 through the resistor R9. Flows to the ground ground GND through the standby power switch T4. Accordingly, the turn-on switch T3 implemented by the PNP bipolar transistor is turned on so that the voltage applied to the resistor R15 turns on the switch T7 provided between the ground ground GND and the analog ground AGND to ground ground GND. ) And the analog ground AGND are connected to operate the devices connected to the analog ground AGND.

The main controller 150 controls the functions of the above-described components as a whole. Specifically, the main controller 150 checks whether the turn-on switch T4 is turned on from the voltage value input to the SHUT terminal to start the operation of the entire rectifier, and when the operation of the entire rectifier is started, the buck / The boost circuit unit 140 is operated to supply power to the load side. At this time, the main controller 150 receives the voltage applied to the resistor R4 through the Vcomp2 terminal, measures the output voltage of the buck / boost circuit unit 140, and receives the voltage applied to the resistor Rcs to the CS terminal and flows the current to the load side. By measuring, the operation (step-up or step-down) of the buck / boost circuit unit 140 may be controlled.

In addition, the main controller 150 may sense a current flowing in the load LOAD by receiving a voltage applied to the resistor Rcs connected in series to the load through the CS terminal. When excessive current flows in the load, the main controller 150 stops the operation of the buck / boost circuit unit 140 to cut off the current flowing to the load, thereby protecting the load circuit and the peripheral circuits, and transmitting the fact through the data transmitter 180. Can be sent to an external device.

In addition, the main controller 150 measures the voltage value charged in the capacitors C1 to Cn of the charging unit 133 from the voltage input through the CG1 to CGn terminals, and checks whether or not a surge voltage is generated. ) Receives zero crossing point information (ZCD) of AC power.

The main controller 150 checks the input voltage currently input to the buck / boost circuit unit 140 by using the voltage value input through the Vcomp2 terminal, and when the input voltage is below the discharge reference voltage near the zero crossing point, DS1 Through the DSn terminal, the discharge control signal is output to the discharge switch unit 131, the one or more discharge switches included in the discharge switch unit 131 are turned on, and the power charged in the capacitor is momentarily discharged, thereby rectifying the unit 110. It overlaps with DC power output from and smoothes.

The main controller 150 determines that a surge voltage is likely to occur when the voltage value input through the CG1 to CGn terminals rises above the reference voltage value while the charge / discharge unit 130 repeats the charging and discharging process. Output the surge control signal through the SGV1 ~ SGVn terminal to turn off the surge protection switch (T5 ~ T6), or adjust the resistance of the surge protection switch (T5 ~ T6) through the SGV1 ~ SGVn terminal. That is, by adjusting the voltage output to the surge protection switch (T5 ~ T6) through the terminals SGV1 ~ SGVn so as to correspond to the voltage value input through the CG1 ~ CGn terminal, by adjusting the resistance of the surge protection switch (T5 ~ T6) Adjust the charge or discharge voltage of the capacitor. This surge protection function will be described below in more detail with reference to FIGS. 4 and 5.

The main controller 150 may receive data from the external device through the data receiver 160 through the RX terminal and execute a command indicated by the corresponding data. In addition, the main controller 150 may transmit data to the external device through the data transmitter 180.

3A is a diagram showing in detail the configuration of the data receiver 160 according to the preferred embodiment of the present invention, and FIG. 3B is a diagram showing the configuration of the data transmitter 180 according to the preferred embodiment of the present invention in detail. 3C is a diagram illustrating an example of the voltage distribution circuits 163 and 183 included in the data receiver 160 and the data transmitter 180 according to an exemplary embodiment of the present invention.

Referring first to FIG. 3A, when data DATA IN is received from an external device, the data receiver 160 drives the oscillator according to the received data, inputs data into the double voltage circuit 163, and doubles the data. The voltage circuit 163 performs voltage doubling on the signal input through the oscillator and outputs a corresponding signal to the shift register 170 and the main controller 150. The voltage distribution circuit 163 according to the preferred embodiment of the present invention may be implemented as a known Cockcroft Walton circuit as shown in FIG. 3C.

In addition, the data transmitter 180 shown in FIG. 3B receives data output from the main controller 150 to drive an internal oscillator, and the oscillator oscillates a frequency signal according to the data input from the main controller 150. The oscillated frequency signal, like the data receiver 160, is increased in voltage through the double voltage circuit 163 and transmitted to the external device. The voltage distribution circuit 183 used in the data transmitter 180 may also be implemented as a known Cockcroft Walton circuit as shown in FIG. 3C.

4 is a view for explaining a concept of preventing a surge voltage according to a preferred embodiment of the present invention.

Referring to FIG. 4, the present invention checks whether or not a surge voltage may occur in the capacitor by measuring a voltage applied to the capacitors C1 to Cn constituting the charging unit 133, and accordingly, the surge protection switch T5. By controlling the resistance of ˜T6), the current flowing through the capacitor is controlled to prevent the actual surge voltage from occurring, and in particular, the surge voltage due to the inrush current is prevented from occurring.

As shown in FIG. 1, the main controller 150 may know the voltage applied to the capacitor by measuring the voltage applied to the resistors R19 and R17 of the voltage divider connected in parallel to the capacitors C1 to Cn, respectively.

In the scheme shown in FIG. 4, the capacitors C1 to Cn and the surge protection switches T5 to T6 in the periods 401 and 402 where the voltages Vc1 and Vcn across the capacitor become equal to or more than a predefined surge protection reference voltage. OFF to control the current not to flow through the surge protection switch (T5 ~ T6) to prevent the occurrence of high voltage surge voltage during charging and discharging of the capacitor. In particular, it prevents the generation of a high-voltage surge voltage by the inrush current during the capacitor discharge.

5 is a view for explaining a concept of preventing a surge voltage according to another preferred embodiment of the present invention.

In the example shown in FIG. 4, the surge protection switches T5 to T6 are turned off while the voltage across the capacitor is greater than or equal to the surge protection reference voltage. However, in the embodiment shown in FIG. 5, the voltage across the capacitor exceeds the surge protection reference voltage. Increasing the resistance value of the surge protection switch in proportion to the amount prevents the generation of the surge voltage.

For example, when the surge protection switches T5 to T6 are implemented as triac switches, the main controller 150 uses the voltage output to the gate of the triac switch, and the voltage applied to the capacitors c1 to cn represents the reference voltage. By outputting in inverse proportion to the excess amount, a surge voltage is prevented by reducing the amount of current flowing through the triac switch.

In the example shown in FIG. 5, while the voltage across the capacitor is less than or equal to the reference voltage, the voltage output from the main controller 150 to the gates of the surge protection switches T5 to T6 through the terminals SGV1 to SGVn completely turns off the surge discharge switch. The voltage to be turned ON is output. '

In the periods 501 and 502 where the voltage across the capacitor is greater than or equal to the reference voltage, a voltage inversely proportional to the voltage greater than or equal to the reference voltage is output from the main controller 150 to the gates of the surge protection switches T5 to T6 through the SGV1 to SGVn terminals. By adjusting the resistance value of the surge protection switch, the surge voltage can be prevented from being generated by controlling the amount of current flowing through the surge protection switch.

6 is a view for explaining a DC smoothing method according to another embodiment of the present invention.

Referring to FIG. 6, when the load of the present invention is a general load, the main controller 150 turns on the discharge switches 131 when the voltage output from the rectifier 110 reaches the discharge reference voltage ref. Perform smoothing. Then, as shown in FIG. 6, the minimum value of the smoothed voltage becomes equal to or greater than the discharge reference voltage value Ref as shown by reference numerals 601 and 602, so that the voltage at the output terminal of the rectifier 110 is equalized to or greater than the discharge reference voltage Ref. do.

However, when the load supplied with the power is overloaded, even when the voltage output from the rectifier 110 reaches the discharge reference voltage ref (see reference numeral 611), the discharge switches 131 are turned on and smoothed. As the current of the capacitor is discharged too quickly, as indicated by reference numeral 612, immediately after the capacitors are all discharged, the voltage at the output terminal of the rectifier 110 drops to near 0V, thereby incomplete voltage smoothing is performed.

Therefore, in another preferred embodiment of the present invention, the main controller 150 outputs a discharge control signal to the discharge switch unit 131 to discharge all the power charged in the charging unit 133 to the output terminal of the rectifier 110 after When the voltage at the output terminal of the rectifier 110 input through the Vcomp1 terminal is lower than the discharge reference voltage Ref as shown by reference numeral 612, the discharge timing is adjusted to achieve uniform voltage smoothing.

To this end, the main controller 150 determines that an overload occurs when the voltage at the output of the rectifier 110 falls below the discharge reference voltage value Ref after all of the power charged in the charger 133 is discharged, and the reference voltage value Ref ) And the discharge unit 133 after the discharge is completed, calculates the average of the minimum voltage value 612 of the rectifier 110 output terminal, resets the discharge reference voltage value (Ref_fix), and reset the discharge reference voltage value (Ref_fix) The discharge timing of the discharge switches 131 is controlled to discharge the capacitor included in the charging unit 133.

Hereinafter, an operation process of the rectifying apparatus according to the preferred embodiment of the present invention will be described sequentially with reference to FIGS. 1 to 6.

First, the rectifier 110 receives external AC power, rectifies it, and outputs DC power that is not smoothed, and detects a zero crossing point at which the external AC power becomes 0, and outputs it to the main controller 150. The unsmoothed direct current power source has a waveform indicated by reference numeral 111 in FIG. 1 (see FIG. 2A).

The power manager 120 generates a VDD voltage by using the DC power output from the rectifier 110, and generates the VDD voltage by using the shift register 170, the data receiver 160, the data transmitter 180, and the main controller 150. ) To drive the corresponding components.

The unsmoothed power output through the rectifier 110 is transmitted to the input terminal of the buck / boost circuit 140, and is an external device (external sensor, remote controller, control device, control server interlocked with the rectifier device of the present invention). When data is received from the data receiver 160, the data receiver 160 outputs the received data to the main controller 150 and the shift register 170.

The data receiver 160 may be implemented using a double voltage circuit 163 such as Cockcroft Walton so as to insulate external devices from the standby power device and drive the standby power device of the present invention with only a small signal. Is as described above.

The shift register 170 compares the data input from the data receiver 160 with previously stored data (that is, an operation start code for instructing to operate the rectifier), so that the data input from the data receiver 160 matches. In order to operate the rectifier, the turn-on signal is output to the standby power switch T4.

When the standby power switch T4 is turned on, the current input from the VDD to the SHUT terminal of the main controller 150 through the resistor R9 flows to the ground ground GND through the standby power switch T4, and thus PNP. The turn-on switch T3 implemented by a bipolar transistor is turned on so that the voltage applied to the resistor R15 turns on the switch T7 installed between the ground ground and the analog ground to connect the ground ground (GND) and the analog ground (AGND). It operates devices connected to analog ground.

Then, the unsmoothed power output from the rectifier 110 charges the capacitors C1 to Cn of the charger 133 through the diodes D2 to Dn.

Thereafter, the main controller 150 uses the zero crossing point information output from the rectifier 110 to discharge the discharge switches 131 in a section in which the DC power supply 111 becomes below the discharge reference voltage near the zero crossing point. Turn on to discharge the voltages stored in the charging unit 133, thereby smoothing the DC power source 111 output from the rectifying unit 110.

To this end, the main controller 150 sequentially turns on the plurality of discharge switches 131 included in the charger 133 near the zero crossing point, thereby charging the capacitors C1 to Cn connected in series to each switch. The voltages are discharged, and the discharged voltages overlap the voltages output from the rectifier 110 to fill the low voltage section, and thus have an effect of smoothing the substantially rectified voltage without using an electrolytic capacitor.

In addition, the DC power supply 113 smoothed by the discharge voltage of the charging unit 133 is stepped down or stepped up through the buck / boost circuit unit 140 and provided to the load side. The main controller 150 receives the output voltage value of the buck / boost circuit unit 140 through the voltage applied to the voltage divider, and receives the current value flowing through the load through the voltage applied to the current sensing resistor Rcs connected in series with the load. By controlling the buck / boost circuit unit 140 by receiving the input, it controls the voltage and current input to the load side.

 At this time, this general state is a state in which no surge voltage is generated, and thus the surge protection switches T5 to T6 are turned on.

Meanwhile, in the process of repeating the above operation, the main controller 150 receives a voltage applied to the surge detection resistors R17 to R19 to investigate whether the surge voltage is continuously generated during charging and discharging, and detects the surge. When the voltage applied to the resistor suddenly increases above the surge protection reference voltage, it is determined that a surge voltage is generated to turn off the surge protection switches T5 to T6 connected in series to the capacitors C1 to Cn of the charging unit 133. Or by controlling the distribution angle, the resistance of the surge protection switch is adjusted to prevent the surge voltage from occurring during the charging and discharging process. In order to prevent surge voltage generation, a method of controlling the surge protection switches T5 to T6 has been described in detail with reference to FIGS. 1 to 5, and thus a detailed description thereof will be omitted.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

110: rectifier 120: power management
130: charge and discharge unit 131: discharge switching unit
133: charging section 140: buck / boost circuit
150: main control unit 160: data receiving unit
170: shift register 180: data transmission unit
190: operation switching unit

Claims (10)

delete Rectifier for rectifying the AC power to output a non-smoothing DC power;
A buck / boost circuit unit receiving DC power from the output terminal of the rectifying unit and boosting or stepping down the load according to a control signal input from the main controller;
When the non-smoothing DC power is charged and the voltage of the non-smoothing DC power is less than or equal to the discharge reference voltage, the smoothed power is discharged to the output terminal of the rectifier in accordance with the discharge control signal input from the main controller. Charge and discharge unit for generating a smoothed DC power by overlapping the non-DC power supply;
A data receiver configured to receive data from an external device and output the data to a shift register;
The shift register outputting an operation start signal when data input from the data receiving unit matches an operation start code;
An operation switching unit driving the charging and discharging unit and the main control unit when the operation start signal is input; And
Control the buck / boost circuit to boost or step down the DC power input to the buck / boost circuit and provide it to the load side, receive a zero crossing point of the AC power from the rectifier, and smooth the vicinity of the zero crossing point. And a main control unit configured to discharge the charge / discharge unit by outputting the discharge control signal to the charge / discharge unit when a DC voltage not equal to or lower than a discharge reference voltage is included.
The charging and discharging unit
A discharge switching unit connected to an output terminal of the rectifying unit and including one or more discharge switches turned on or off according to the discharge control signal; And
One or more capacitors connected in series with the discharge switch and charged by the unsmoothed direct current power source and discharged when the discharge switch is on; and
And a charging unit including a surge protection switch connected in series to each of the capacitors, the resistance of which is controlled in response to a surge protection control signal input from the main controller. The method of claim 2, wherein the main control unit
And the surge prevention switch is turned off while the voltage applied to the capacitor is equal to or greater than the surge prevention reference voltage to prevent generation of a surge voltage. The method of claim 2, wherein the main control unit
While the voltage across the capacitor is greater than or equal to the surge protection reference voltage, the occurrence of surge voltage is prevented by increasing the resistance value of the surge protection switch in proportion to the amount of the voltage across the capacitor exceeding the surge protection reference voltage. Rectifier. The method of claim 4, wherein
The surge protection switch is implemented as a triac switch,
The main controller outputs a voltage which is inversely proportional to the amount of the voltage applied to the capacitor exceeding the surge protection reference voltage to the gate of the triac switch, thereby increasing the resistance value of the surge protection switch to prevent generation of a surge voltage. Rectifier device, characterized in that. The method of claim 2, wherein the operation switching unit
The rectifier device, characterized in that for driving the charging and discharging unit and the main control unit by connecting the ground and the analog ground when the operation start signal is input from the shift register. The method of claim 2,
The apparatus may further include a power manager configured to generate a driving voltage VDD using the DC power output from the rectifier, and output the driving voltage VDD to the shift register, the data receiver, and the main controller. Rectifier. The method of claim 2, wherein the data receiving unit
An oscillator driven according to data received from an external device to generate a signal corresponding to the received data; And
And a double voltage circuit for amplifying the signal output to the oscillator and outputting the amplified signal to the shift register and the main controller. The method of claim 2, wherein the main control unit
Immediately after the discharge control signal is output to the charging and discharging unit to discharge all the power charged in the charging and discharging unit to the output terminal of the rectifying unit, when the voltage at the output terminal of the rectifying unit falls below the discharge reference voltage, the discharge reference voltage value and And an average value of the lowest voltage value of the output terminal less than the discharge reference voltage is reset to a discharge reference voltage value, and the discharge timing is adjusted to discharge the charge / discharge unit at the reset discharge reference voltage value. The method of claim 2, wherein the main control unit
And a current flowing through the load from a voltage applied to a resistor connected in series to the load, and stopping an operation of the buck / boost circuit unit when an overcurrent flows in the load.

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